/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://github.com/payara/Payara/blob/main/LICENSE.txt
 * See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at legal/OPEN-SOURCE-LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.jdo.api.persistence.enhancer.classfile;

import java.io.*;
import java.util.Vector;
import java.util.Enumeration;

/**
 * ExceptionTable represents the exception handlers within the code
 * of a method.
 */

public class ExceptionTable {
  /* A variable length list of ExceptionRange objects */
  private Vector theVector = new Vector();

  /* public accessors */

  /**
   * Return an enumeration of the exception handlers
   * Each element in the enumeration is an ExceptionRange
   */
  public Enumeration handlers() {
    return theVector.elements();
  }

  /**
   * Add an exception handler to the list
   */
  public void addElement(ExceptionRange range) {
    theVector.addElement(range);
  }

  public ExceptionTable() { }

  /* package local methods */

  static ExceptionTable read(DataInputStream data, CodeEnv env)
    throws IOException {
    ExceptionTable excTable = new ExceptionTable();
    int nExcepts = data.readUnsignedShort();
    while (nExcepts-- > 0) {
      excTable.addElement(ExceptionRange.read(data, env));
    }
    return excTable;
  }

  void write(DataOutputStream out) throws IOException {
    out.writeShort(theVector.size());
    for (int i=0; i<theVector.size(); i++)
      ((ExceptionRange) theVector.elementAt(i)).write(out);
  }

  void print(PrintStream out, int indent) {
    ClassPrint.spaces(out, indent);
    out.println("Exception Table: ");//NOI18N
    for (int i=0; i<theVector.size(); i++)
      ((ExceptionRange) theVector.elementAt(i)).print(out, indent+2);
  }
}



